@charset "UTF-8";
.app, html, body {
  width: 100%;
  height: 100%;
}

/* app 开始 */
.app {
  display: flex;
  flex-direction: column;
}

/* header */
header {
  width: 100%;
  height: 1rem;
  background: pink;
}

/* main */
main {
  flex: 1;
  overflow-y: auto;
}

/* footer */
footer {
  width: 100%;
  height: 1rem;
  background: yellow;
}
